Pile-fabric loom



2 T R U B H O PILE FABRIC LOOM.

' Patented Nov. 16, 1897.

- fiwenfa (No Model.) 2 Sheets-Sheet 2. O. H. BURT.

PILE FABRIC LOOM.

No. 593,957. Patented Nov. 16,1897.

UNITED STATES PATENT OFFICE.

CHARLES H. BURT, OF WARREN, MASSACHUSETTS, ASSIGNOR TO THE BURT- WVORTH CARPET COMPANY, OF SPRINGFIELD,MASSACHUSETTS.

PlLE-FABRIC LOOM.

SPECIFICATION forming part of Letters Patent No. 593,957, dated November 16, 1897. Application filed J11l181'7,1897. Serial 110. 641,111. (1101110161.)

Looms, of which the following is a 'specifica-.

tion.

This invention relates to improvements in pile-fabric looms, and particularly to that class in which an endless band-knife isemployed, and has for its object the improvement in means for supporting, operating, and sharpening said knife and in means for keeping it in perfect operative alinement.

The invention consists in the construction and arrangement of the parts, all as fully herewithin described and claimed.

In the drawings forming part of this specification, Figure lis an elevation of the end of aloom having applied thereto theimprovements forming the subject of this application. Fig. 1 is a plan View showing means for ad.- justing one of the pulleys on which the bandknife runs. Fig. 1 is a perspective view of the parts of the adjustable bracket supportin g the grinding-wheel which operates on the edge of the knife.- Fig. 2 is a side elevation of the end of the loom shown in Fig. 1. Fig. 3 is a sectional view of the loom, taken on line 3 3, Fig. 1, somewhat enlarged. Fig. 4 is a perspective view of a guide and a backing-wheel for the band-knife.

Referring to the drawings, A represents the frame of a loom, in which is a drivingshaft B, having thereon the tight and loose pulleys b b, on which runs a suitable belt for rotating said shaft. A gear B on said shaft meshes with the gear C on shaft 0, which is a short shaft suitably supported in the frame A, through which, as hereinafter described, movement is imparted to the band-knife.

A gear 0' on the shaft C meshes with the gearD on the shaft D. On the latter is an eccentric 2, by which reciprocatory movement is given to an oil-stone which operates on the edge of the band-knife after it has been ground by the grinding-wheel above referred-to, and the connections from said eccentric to said stone will be described farther on.

In Fig. 1 is shown a pulley 3, supported for rotation on a'stud 4;, fixed to the frame of the loom in any convenient manner, and on the opposite side of the loom, supported in a bracket 5, is astud 6, on which the pulley 3 rotates. A band-knife E runs on these pulleys 3 and 3. The stud 6, on which the pulley 3 rotates, is fixed to block 7, which is movable back and forth in a yoke 8, which is supported on pivots 9, which are screwed through two lugs 10, caston the bracket 5, all as clearly shown in Figs. 1 and 1.

8 for tightening the band-knife E on its pulleys by a screw 12, engaging one end of said yoke and 'screwinginto a suitably-threaded I The said block 7 is .moved back and forth in its yoke E consist of abevel-gear f on the shaft C in mesh with a bevel-gear f on the end of a shaft F, (see Fig. 2,) suitably supported in Y bearings on the frame A. On the end of said shaft F is a sprocket-wheel F, and on the hub of the pulley 3 is a sprocket-wheel F and a 1 suitable sprocket-chain F running over said sprockets, drives the pulley 3 at a proper speed.

The means for grinding the edge of the band-knife E consist in a grinding-wheel 14,

of suitable material such as emery, for examplemounted on an arbor 15, supported in a bearing 16, which has a vertical movement in the swinging frame 17, pivoted to the frame A at 18, Fig. 2. Means for rotating said arbor at proper speed consist in a suitable pulley 15 on the driving-shaft B and a pulley 15 on the end of the arbor, said pulleys being provided with a proper belt 15.

The means for moving the bearing 16 in the frame 17 consist in a screw-rod 19, engaging one end of said frame and engaging a threaded hole in the said bearing. A suitable bolt 16 projects from the rear of the bearing 16 through the frame 17, and a nut thereon serves to secure the said bearing in any described position to which it may have been raised by the screw-rod 19. The swinging frame 17 is adjustable in the arc of a circle of which the pivot 18 is the center, and a segment-shaped piece 20, Fig. 1", cast on said frame is provided with a slot 21, concentric with the pivot 18, and a bolt 22, passing through a suitable hole in the frame, passes through said slot 21. When said bolt is loosened, the swinging frame 17 may be swung on its pivot 18 and by tightening said bolt may be secured in any desired position.

For the purpose of supporting the bladeknife E against the pressure of the grindingwheel the guide-fingers d for holding said knife in a horizontal position and a backingwheel d for preventing the blade-knife from being moved transversely to the face of the pulley 3 are provided and supported on an arm d adjustably supported on the bottom of the bearing 16. This device is shown only in Figs. 1 and 4. The purpose of said various adjustable features of the wheel and its frame is to permit the setting of the said wheel to proper positions for grinding bevels of varying pitch on the edge of the band-knife E and for adapting the constantly-reducing diameter of the stone to the required beveled edge of the band-knife. Said grinding-wheel operates on the outer surface of the bandknife E, as shown in the drawings.

The operation of the grinding-wheel on the edge of the knife turns the cutting edge thereof and leaves it rough, and before it will out without tearing the said turned edge must be straightened out and made as smooth as possible or the surfaces of fabric operated on by the knife will not present a smooth level appearance.

The device for stoning the ground edge of the knife-blade consists in an arm 23, pivotally supported on the floor, to whose upper extremity is pivoted one end of an arm 24:. On the under side of the opposite end of said last-named arm is secured the stone 25 in any convenient manner. The stone 25 is applied to that surface of the knife-edge opposite to that on which the grinding-wheel operates, to the end that the edge turned over by the action of the grinding-wheel may be straightened out and made smooth by the action of the stone thereon.

The length of the arm 24 is such that the stone 25 will rest on the knife-blade, and the position of the said arm is such that the stone will lie thereon in a slightly-inclined position, as shown in Fig. 2.

Awooden guard 26, supported on the frame of the machine, incloses the knife in its passage from the lower edge of the pulley 3 to the lower edge of the pulley 3, and this guard is cut away at 27 to give access to the blade for the stoning thereof.

A suitable transverse motion is provided for the stone 25 at right angles to the line of movement of the knife by a connecting-rod 2, one end of which is pivotally attached to the arm 23 and on the other end of which is a strap connection with the eccentric 2 on the shaft D. A series of holes 28 is provided in said arm 23, whereby the end of the connecting-rod 2 may be pivotally secured thereto at different places for varying the traverse of the stone across the edge of the blade.

Means for backing up that part of the bladeknife E that operates on the woven fabric to sever the threads thereof, as shown in Fig. 3, consist in a wooden sheath 29, made of two strips held together by clamps 30 near each end thereof, bolts 31 passing through said clamps and strips and tightly securing them. The edges of said strips are grooved to receive the band-knife E, and the groove is of such depth that the cutting edge of the knife projects therefrom far enough to effectively operate on the threads to be severed, all of which is clearly shown in said figure. Said clamps 30 are provided with a shank 32,which passes horizontally through the head 33 of a stud 34, which is secured to the frame of the loom. Said stud 34 is adjustable vertically by a screw 35, and said clamps are adjustable horizontally in the heads 33 and secured therein by a set-screw 36. By means of the above described construction the knife E may be held rigidly to its work, the said backing-sheath 29 preventing its being run off from its pulleys 3 and 3 by the pressure of the woven fabric W against its edge. After being woven the fabric passes between the bearing-plates G G, which extend transversely of the frame of the loom and are supported thereon on brackets 37. (See Figs. 2 and 3.) The edge of the band-knife E is adj usted to lie opposite the center of the opening between said bearing-plates. When the fabric has been severed, theupper half passes partly around a toothed roll H, as shown, and from thence to a take-up roll, and the lower half passes partly around the toothed roll H, and thence to its take-up roll, all in the usual manner.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a double-pile-fabric loom, two studs supported on the frame thereof, one fixed and the other supported in a bearing, movable toward and from said fixed stud, in a frame hung on trunnions, and adapted to be moved in a plane coinciding with and at right angles to the plane of movement of said bearing, pulleys on said studs, a band-knife on said pulleys, the operative edge of which knife has a direction of movement transverse to the direction of movement of the fabric woven on said loom during the operation thereof, combined with a horizontally and vertically ad justable backing sheath for the operative edge of said band-knife, a grinding-wheel movable vertically in a frame having a swingingmovement toward and away from the outer edge of said knife, and a smoothingstone havinga reciprocating movement transversely across the inner edge of said knife, at a point beyond the contact thereof with said grinding-wheel, and means for operating said knife, said grinding-wheel, and said smoothing-stone, substantially as described.

2. In a double-pile-fabric loom, a fixed stud in the frame of said loom having a pulley thereon, a movable stud having a pulley thereon, a band-knife engaging said pulleys, a bearing-block 7 for said movable stud, a

- yoke 8 in which said bearing-block has a movement toward and from said fixed stud, a fixed support 5, for said yoke, pivot-screws 9, for the latterin said support 5,an adj usting-screw 13, in said support 5, the point of which screw engages with said yoke for moving it in a direction at right angles to the movement of said bearing-block, a Vertically and horizontally adjustable backing-sheath for supporting the operative edge of said band-knife, a grinding-wheel movable vertically in a frame having a swinging movement toward and away from the outer edge of said knife, and a smoothing stone having a reciprocating movement transversely across the inner edge of said knife at a point beyond the contact of said-grinding-wheel therewith, and means for operating said knife, said grinding-wheel, and

said smoothing-stone, substantially as described.

3. In a double-pile-fabric loom, two studs supported on the frame thereof, one fixed and the other supported in a bearing movable toward and from said fixed stud in a frame hung on trunnions and adapted to be moved in a plane coinciding with and at right angles to the plane of movement of said bearing, pulleys on said studs, a band-knife on said pulleys, the operative edge of which knife has a direction of movement transverse to the direction of movement ofthe fabric woven on said loom during the operation thereof, combined with a horizontally and vertically adjustable backing-sheath for the operative edge of said band-knife, a grinding-wheel movable vertically in a frame having a swinging movement toward and away from the outer edge of said knife, an arm secured to a fixed support in proximity to the said grinding-wheel for supporting said knife against the action of said wheel, a smoothing-stone having a reciprocating movement transversely across the inner edge of said knife,

at a point beyond the contact thereof with said grinding-wheel, and means for operating said knife, said grinding-wheel, and said smoothing-stone, substantially as described.

CHARLES H.-BURT. Witnesses:

I-L A. CHAPIN, K. I. OLEMoNs. 

